UMI Performance 4036-B Rear Upper Control Arms with Roto-Joint Technology

The UMI Performance 4036-B rear upper control arms deliver superior suspension performance through innovative Roto-Joint technology, combining the precision of spherical rod ends with the streetable comfort of traditional bushings. Designed for high-performance street cars, autocross, and road race applications, these control arms eliminate suspension bind while minimizing wheel hop and improving cornering precision.

Roto-Joint Technology Benefits:

• Spherical design provides 28 degrees of total unrestricted movement for bind-free operation
• Greaseable delrin race absorbs shock and road noise for quiet, comfortable street driving
• 4140 chromoly hard chrome-plated ball ensures extensive wear resistance
• Adjustable and 100% rebuildable design for long-term maintenance
• Superior traction and reduced wheel hop compared to rubber or polyurethane bushings

Heavy-Duty Construction:

• Manufactured from 1.500" x 0.120" DOM mild steel tubing for maximum strength
• CNC machined mounting plates from 0.250" thick mild steel
• Precision CNC machining ensures accurate tolerances and proper fitment
• Durable powder coat finish protects against corrosion and wear

Installation and Maintenance:

• Direct bolt-on replacement using OEM hardware
• Shipped fully assembled with Roto-Joints installed and ready to install
• Includes spanner wrench for adjusting and disassembling Roto-Joints
• Greaseable design allows easy maintenance for extended service life
• Delrin race is replaceable if wear occurs over time

These control arms offer the perfect balance between track-ready performance and daily driver comfort. The Roto-Joint design allows unrestricted rear suspension articulation during aggressive driving while maintaining the smooth, quiet operation expected from a street vehicle. Ideal for enthusiasts seeking improved handling consistency and cornering performance without sacrificing ride quality.